function addEvent( obj, type, fn ) {
       if ( obj.attachEvent ) {
	  obj['e'+type+fn] = fn;
	  obj[type+fn] = function(){obj['e'+type+fn]( window.event );}
	  obj.attachEvent( 'on'+type, obj[type+fn] );
       } else
	  obj.addEventListener( type, fn, false );
    }